Typewriting machine



Feb. 17. 1925.

G. W. CAMPBELL TYPEWRITING MACHINE Original Filed Feb. 2.0, 1922Patented Feb. 17, 1925.

UNITED STATES P ATEN T O F FlC E y-GEORGE W. CAMPBELL, OF :HARIFORD,CONNECTICUT, ASSIGNOB T0 UNDEBW'OOD TYPEWRITERCOMPANY, 013 NEW YORK, N.YL, A COBPOBATION 01E DELFIWAEE.

TYPE'WIt-ITING MACHINE.

Original application filedFebruary 20, 1922, SerialNo. 537,718. Dividedand this application filed March 25,

Tot/ll 1071 am it may concern :Be it known thatI, GEORGE W. CAMPBELL, aCllllZBIlHOI lJllB UnitedYStates, residing in Hartford, inthe county ofHartford ant State of Connecticut, have invented certain new and usefulImprovements in TypewritingMachines; of which :the following is aspecification.

The present: invention relates to sounddeadening casings for typewritingmachines.

wSucha casing usually has a pane of trans parentglass through which theoperator may observe the printingon the platen. Various expedients havebeen resorted to for preventing objectionable reflections from thesurface of the glass to the eyes of the o erator. Blinds have beenprovided, positionable upon the casing in suchmanner as to intercept therays of light directed at said pane.

An object of the present invention is the provision for this purpose ofa blind of an improved construction, which may be connected to thecasing ina simple manner, and readily detached; and which may bemarketed as an article, unitary in itself; and which, to be applied tothe casing, requires no modification or special structure of the latter.

This is a division of my co-pending application, Serial No. 537,718,filed February 20, 1922.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a fragmentary view, in side elevation, partlycross-sectional, showing the upper part of the casing, the upper part ofthe typewriting machine being indicated in the casing.

Figure 2 is a cross-sectional detail view, on the line 2-2 of Figure 1,showing the attachment of the blind to the casing-cover.

Figure 3 is a front view of the assembly shown in Figure 1 except thatthe typewriting machine is not indicated.

Referring to the drawings, the sounddeadening casing for the typewritingmachine 15 is shown as comprising a bodyportion 10, having a cover-part11 hinged thereto at 12. The casing is preferably a die-casting, havinga lining, not shown, of Suitable sound-deadening material.

Serial No, 251,679.

The casing 10-11 has the usual opening 41 in the top of the cover 11,through which the operator may observe the printing on the platen. Arectangular ribbing 42, depending inward from the top of the cover 11,serves as a frame for a window-pane of glass or other transparentmaterial, and clamps d4: serve to hold the window-pane 43 against a seat45 in the ribbing 1.-2. Sheets-metal ears id-secured by screws 47 tothe-side walls of the window-frame, serve as bearings for pivot pins .8,on which are mounted arms or plates 4C9 which support a blind 50. Theplates 4-9 are cut away at 51 centrally of their upper edges, and,forward :and rearwardof these cuts 51, have offsets 52, to which theblind is soldered or otherwise secured. The blind 50 may be of thinsheet-metal or other suitable material; and, to strengthen the same, isprovided near its edges with corrugations 53, and is centrally curved asat 54.

In Figure 1 the blind 50 is shown as set at such an angle that its rearedge 55 rests upon or is in contact with the top of the cover 11. Theangular setting of the blind may, however, be varied at will byloosening the nuts 56 on the screws 48, which serve as the pivot pinsfor said arms a9, and by tightening these nuts after the arms 49 havebeen swung to the desired position.

It will be noted that, upon removal of the screws 47, the ears i6,together with the arms 49 and blind 50, may be removed as a unit whendesired. It will also be noted that the blind 50 and its connections areattachable to the cover 11 without modification of the latter, and thatthe attachment is so simple and convenient that the device may bemarketed independently of the easing 10-11, to be bought and attached tothe casing if desired.

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others.

Having thus described my invention, I claim:

1. A sound-deadening casing for a type writing machine, having anopening therein through which the operator may observe the printing onthe platen of a machine within the same, a frame formed in the wall ofthe casing for a window-pane, brackets set within the opening andsecured to the sides of the frame, and a blind secured to the brackets.

2. A sound-deadening casing for a typewriting machine, having an openingtherein through which the operator may observe the printing on theplaten of a machine within the same, a frame formed in the wall of thecasing for a window-pane, fiat, detachable brackets set within theopening and secured to the sides of the frame, and a blind secured tothe brackets.

3. A sound-deadening casing for a typewriting machine, having an openingtherein through which the operator may observe the printing on theplaten of amachine within the same, a frame formed in the wall of thecasing for a window-pane flat, detachable brackets set within theopening and secured to the sides of the frame, and a blind pivotallyadjustable on the brackets.

4:. A sound-deadening casing for a typewriting machine, having anopening therein through which the operator may observe the printing onthe platen of a machine \.i:11'll11 the same, a. frame formed in thewall of the casing for a window-pane, brackets on the casing, and acorrugated sheet-metal blind secured to the brackets.

5. A sound-deadening casing for a typewriting machine, having an openingtherein through which the operator may observe the printing on theplaten of a machine within the same, a frame formed in the wall of thecasing for a Window-pane, brackets on the casing midway of the sides ofthe opening, a. sheet-metal blind corrugated near its edges, anddetachable plates pivotally adjustable on the brackets for supportingthe blind midway of the sides thereof.

6. A blind for the window of a sounddeadening casing, comprising anon-transparent plate, arms to which the plate is seecured, b1; ckets.and pivotally adjustable connections for the arms to the brackets, suchthat the brackets, arms and plate form an angularly flexible unitarystructure attachable at will to the casing.

7. A sound-deadening casing for a typewriting machine, having therein anopening through which the operator may observe the printing on theplaten of the machine with in said casing, a. frame formed in the wallof the casing for a window-pane, brackets on the casing midway of thesides of said opening, a blind for said pane, and plates pivotallyadjustable on the brackets for porting said blind.

GEORGE W. CA MPBELL.

Witnesses EDWARD P. STORY, EDWARD AMERWAN.

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